TWI484081B - Adjusting structure of swing arm and swing center of sewing machine control stroke - Google Patents

Description

Adjusting structure of swing arm and swing center of sewing machine control stroke

The invention relates to an adjustment structure of a swing arm and a swing center of a sewing machine control stroke, in particular to a structure in which the swing center and the swing arm of the swing arm for the sewing machine presser foot stroke control can be accurately adjusted to an optimal relative position. In order to make the starting point of the trip work in the most accurate state, in the easiest way, to achieve the purpose of improving the quality of the stroke control.

According to the current sewing machine structure, there are many component movements from the movement of the circumference to the linear motion of the back and forth, or the movement control in the computer sewing machine. It is often necessary to have a straight line to control the stroke operation, and the control of the stroke is for the sewing quality. The impact is extremely large, such as: the presser foot has different designs for different tasks, and because of the different requirements of the sewing task, the presser foot has different stroke design with the task, such as when sewing the button, The structure of the pressing foot is different from that of other sewing tasks. The end of the pressing foot is fixed to one end of the pressing foot, and the structure of the pressing cloth pressing the table cloth can be along with the table cloth according to the stroke of the back and forth. The displacement, the stroke of the displacement, as shown in Fig. 1, wherein the long side of the buttonhole O in the stroke is the first stroke X1, from the beginning of the first stroke X1 to the end X11, to the end Point X12, that is, directly to the start point Y11 of the second stroke Y1 in the horizontal direction, to the end point Y12 of the second stroke Y1, and then to the start point X21 of the third stroke X2 in the vertical direction, to the end point X22 , that is, go directly to The starting point Y21 of the fourth stroke Y2 in the flat direction, to the end point Y22 of the second stroke Y2, wherein the sewing machine is located when the pressing foot is located at the starting point X11 of the first stroke X1 of the buttonhole O The first sensing electrode of the stroke sensing device is electrically conductive, so that the sewing machine starts to operate, and the long side of the buttonhole O is sewn from the starting point X11 to the ending point X12 along the first stroke X1. After the pressing foot is displaced to electrically connect the second sensing electrode of the stroke sensing device, the pressing foot starts to move horizontally with the table cloth, from the starting point Y21 of the fourth stroke Y2 to the last point Y22 , directly to the start point X21 of the third stroke X2 to perform the sewing operation of the third stroke X2, and immediately after the end point X22, directly to the starting point Y21 to the last point Y22 of the fourth stroke Y2 in the horizontal direction and the first At the beginning of the journey X1, the X11 stitcher; however, the above action is ideal, and it should be able to be completed smoothly. However, in the current sewing machine, the structure of this part cannot be adjusted. When the sewing machine is used for a period of time, The parts are loose and the margin of error increases. Therefore, these The first and second sensing electrodes of the stroke sensing device are respectively touched to the position of electrical conduction, and often have a different position from the correct position of the pressing foot, so that the shape of the button hole O thus sewn is missing, such as As shown in FIG. 1-1, when the third stroke X2 is reached to the end point X22 of the stroke, the length of the long sides of the two sides of the buttonhole O is different, so that the buttonhole O cannot be completely intact. a molder; and the operator sets the first and second sensing electrode contact positions of the stroke sensing device and the relative position of the pressing cloth to be mutually adjustable, so that the starting point of the pressing foot is The position can be controlled, but the structural design of the adjustment is adjusted in the form of a cam as the reference for adjusting the displacement. In the principle of mechanical design, it is known that the cam is used for the adjustment of the displacement, and often has a non-unidirectional direction. Displacement change, that is, during the adjustment process, when the movement in the horizontal direction is to be adjusted, the displacement in the vertical direction is often accompanied, and the side effect of unnecessary movement in the other direction is generated, so that the stroke of the presser foot is rather not determine , Hence unable to meet the current needs of this pressure on a cloth foot stroke precise control, it is necessary those who improved on it.

In view of this, the inventor of this case has carefully studied and developed many years of experience in the development of various sewing machines and sewing machines, and finally developed an adjustment structure for the swing arm and swing center of the sewing machine control stroke.

The object of the present invention is to provide an adjustment structure of a swing arm and a swing center of a sewing machine control stroke, which is a member which can be horizontally slid relative to each other by a adjusting device provided on a pivot of a swing arm and a swing center, and The adjusting bolt and the elastic member of the adjusting device disposed between the members enable the swinging center of the swing arm and the overall structure relative position of the swing arm to be effectively horizontally moved relative to each other, and after being adjusted, immediately positioned and positioned accurately, without The complicated adjustment process, and the position of the swing arm can be accurately contacted with the sensing electrode of the stroke sensing device.

Another object of the present invention is to provide an adjustment structure of a swing arm and a swing center for controlling a stroke of a sewing machine, and the elastic member and the adjusting bolt are arranged by the swing arm and the adjusting device to keep the related components optimal. The state of the elastic pre-stress, that is, the state in which the slack is maintained in an optimally tight state, and the overall structure is maintained at an optimum stability.

Another object of the present invention is to provide an adjustment structure of a swing arm and a swing center of a sewing machine control stroke. The adjustment device structure is directly constructed on the swing arm and the pivot shaft, and does not require another complicated structure or cam design. The assembly is simplified and convenient.

The above described objects, features and other advantages of the present invention will become apparent to those skilled in the <RTIgt; An in-depth and specific understanding can be obtained, but the invention is not the only embodiment, and is described herein.

The structure of the present invention is as shown in FIG. 2, and a plate-like structure is bent at a free end of the sewing machine cantilever 100 to form a fixing frame 20, and the fixing frame 20 is provided with a stroke sensing. The device A includes a sensor 30, a swing arm group B that is moved by the presser foot 11 disposed at the bottom of the presser foot 10 to change the position, and the swing arm group B has a The main body 40 of the actuating sensor 30 is opened and closed, and a sliding member 50 is vertically sleeved on the main body 40. The sliding member 50 is sleeved at one end of the main body 40, and the other end of the sliding member 50 is The direction of the presser foot 11 is extended, and reaches a height that can be moved to the top of the stroke when the presser foot 11 is horizontally moved to the beginning end of the stroke; however, the structures are all conventional structures. The characteristics are not mentioned here.

The sensor 30 has a first chip sensing portion 31 in the form of a metal sheet electrode, a second sensing portion 32, and a movement between the two sensing portions 31 and 32 which is also a metal sheet electrode shape. The sensing unit 33 is connected to the computer of the sewing machine with a wire 34 connected to one end of each of the sensing portions 31 and 32 and the sensing portion 33. The other end of the sensing portion 33 is moved by the main body 40 of the swing arm group B, so that the sensing portion 33 is moved to the beginning end of the stroke when the pressing portion 11 is moved, and the sliding member 50 is connected to the swing arm. At 40 o'clock, it can be moved to any one of the two sensing portions 31 or 32. The sensing portions 31 and 32 and the sensing portion 33 are in the form of an electrode sheet according to the embodiment, and may also be a photosensitive device. The sensing structure of the occlusion, but these sensing devices are conventional structures and will not be described again.

The fixing frame 20 is provided with a locking hole 200 in the form of a screw hole, so as to cooperate with the locking of a pivot shaft 21, the pivoting shaft 21 is pivotally connected with the swing arm group B, so that the swing arm group B as a whole is the pivot shaft 21 a pivoting member, the narrowest end of the pivot shaft 21 has an external thread for screwing into the locking hole 200, and the outer diameter at the middle portion is slightly larger than the end portion locked into the locking hole 200, and is a cylinder. A disk-shaped head is formed at the end; a bottom portion of the main body 40 of the swing arm group B is provided with a pivoting portion 41 at a position relative to the locking hole 200 of the fixing frame 20, and the pivoting portion 41 is a rectangular frame. The body structure has a slotted slot 410 in the center of the pivoting portion 41, and the slot 410 is in the form of a horizontally extending hollow slot, and a threaded hole is formed on a side wall of the pivoting portion 41. The adjusting hole 411 is provided for the adjustment device 60 to be screwed through the member for adjustment; and the first side wall 412 and the second side wall 413 are formed on the two sides of the pivoting portion 41, and the two side walls 412 are respectively A top end wall 414 is connected in parallel with the bottom end wall 415, and a screw hole is arranged in the center of the top and bottom end surfaces of the pivoting portion 41. The fixing holes 416, 417 of the shape are used for the adjustment device 60 to be threaded for adjustment, and the wall thickness portions of the fixing holes 416, 417 are formed with the front end wall 414 and the bottom end wall 415. The structure of the unity.

The adjusting device 60 has a slider 61 of a square cylindrical body, and the slider 61 is disposed on the bottom end surface of the pivoting portion 41 to slide into the sliding slot 410, and has a top end and a bottom end surface. The top end wall 414 of the pivoting portion 41 is flush with the bottom end wall 415. A pivot hole 610 is defined in the center of the slider 61 for the aforementioned pivot shaft 21 to pass through. The pivot shaft 21 is fixed to the lock hole. In the case of 200, the pivot hole 610 of the slider 61 is located on the outer diameter of the cylinder of the pivot 21, so that the slider 61 can be rotated on the pivot 21; the slider 61 is exposed to the sliding slot 410. The end portion extends upwardly and downwardly from a lug 612 having a sliding groove 611, and the sliding groove 611 is horizontally extended. The sliding groove 611 is a bolt-shaped fixing member 64 passing through and screwing into the The two fixing holes 416, 417 of the pivoting portion 41 are fixed, so that the slider 61 can be tightly fixed via the fixing member 64, or the fixing member 64 can be loosened to make the slider 61 horizontally slide in the sliding slot 410. The adjusting device 60 further has a spring element 62 in the form of a coil spring and an adjusting bolt 63 in the form of a bolt. The elastic element 62 is disposed between the sliding slot 410 and the slider 61. For example, the elastic member 62 is disposed in the sliding slot 410 and elastically abuts against the end surface of the second sidewall 413 of the pivoting portion 41 facing the sliding slot 410 and the opposite end surface of the slider 61; The adjusting pin 63 is screwed into the adjusting hole 411 of the first side wall 412 of the sliding slot 410, and passes through the first side wall 412 of the pivoting portion 41 to enter the end of the sliding slot 410 to abut the slider 61. On the opposite end surface, when the adjustment is not performed, as shown in FIG. 3, the elastic member 62 is abutted between the sliding slot 410 and the slider 61 to provide the slider 61 and the adjusting plug 63. Resilience to each other.

When adjusting, the position of the main body 40 of the swing arm group B and the slider 61 and the pivot 21 can be adjusted by the screw rotation of the adjusting pin 63, as shown in FIG. 4, and the main body is made as shown in FIG. The sensing portion 33 of the interlocking 40 can be adjusted to be in contact with the first sensing portion 31 in advance, and when the pressing foot 11 starts to act, the sliding member 50 and the main body 40 can be rotated about the pivot 21, so that The sensing portion 33 moves to contact the second sensing portion 32 to change a different stroke, as shown in FIG. 5, that is, when the sensing portion 33 is in contact with the first sensing portion 31, that is, the first stroke of the buttonhole O When the sensing portion 33 is connected to the second sensing portion 32, the second stroke X1 is performed after the second stroke Y1 is performed, and the sensing portion 33 is contacted with the first sensing portion 31 to perform the fourth stroke. Y2.

With the above structure, the following functions can be achieved, including:

1. The fineness of the fine adjustment is high: the position of the pivoting portion 41 of the main body 40 and the slider 61 and the pivot 21 can be fast by the spiral rotation of the adjusting pin 63 and the abutment of the elastic member 62. In the process of adjustment and adjustment, the main body 40 and the pivot 21 are only horizontally displaced, and there is no high or low difference, so that the swing arm group B can accurately move when the presser foot 11 is actuated. The electrode 33 contacts the first sensing electrode 31 and the second sensing electrode 32 to ensure the accuracy and quality of the sewing of the buttonhole O.

2. The overall structure is stable: the elastic member 62 is abutted against the inner wall of the sliding groove 410 in the pivoting portion 41 of the main body 40 and the end surface of the slider 61 on the pivot 21, so that the swing arm group B is integrally pivoted. The shaft 21 and the adjusting device 60 are indeed elastically and tightly positioned to achieve the purpose of structural stability.

According to another embodiment of the present invention, as shown in FIGS. 6 and 7, the slider 61 is exposed at the end of the sliding slot 41, and the horizontally extending laterally extends a lug 612. The extending portion 613 of the slab is disposed at the opening of the sliding slot 410, and extends beyond the first sidewall 412 to extend parallel to the first sidewall 412, and is provided with a screw hole 614 of a screw hole shape. The adjusting pin 63' can be screwed into the screw hole 614 and facing the first side wall 412, and the elastic member 62' of the embodiment is disposed between the first side wall 412 and the slider 61. The aforementioned functions.

The finely tuned structure is as shown in FIG. 8. The pivot 21 is sleeved with a slider 61 having a continuous toothed engagement portion 615, and the top end wall 43 of the pivotal portion 41 is opposite to the end surface of the slider 61. The tooth-shaped engagement row 413 is also configured to cooperate with each other, and the end portion of the slider 61 exposed to the sliding groove 410 is enlarged to form a disk-shaped head 616. When adjusting, the user The head portion 616 can be pulled so that the slider 61 can be pulled away from the sliding slot 410 along the tooth-shaped direction of the engaging portion 615 and the axial direction of the pivot shaft 21, and the pivoting portion 41 is moved to an appropriate position, and then The slider 61 is reinstalled in the sliding slot 410 and on the pivot 21, and the engaging portion 615 is re-engaged in the engaging row 413 of the sliding slot 410.

As shown in FIG. 9, the slider 61 is configured as a cylindrical body, and is provided on the surface with respect to the meshing row 413 of the sliding groove 410 in the foregoing embodiment, and a slanting portion 617 of a sector-shaped shape is provided. The rotation of the slider 61 can achieve an adjustment operator that controls the horizontal movement of the pivoting portion 41.

The sliding member 50 and the main body 40 are further provided with an arcuate elastic piece 51 to provide an elastic frictional force when the sliding member 50 moves in the main body 40. The elastic piece 51 is attached to the main body 40 for the purpose. The slider 50 passes through the side of the bottom end, and when the slider 50 passes, the elastic piece is elastically fitted with the elastic piece 51.

In summary, the invention disclosed in the present invention discloses the adjustment structure of the swing arm and the swing center of the sewing machine control stroke, and the special design has been "having the industrial availability" should be undoubted, in addition, revealed in the creation of the case. The technical features have not been seen in publications before the application, nor have they been used publicly. In addition, the facts of the above-mentioned effects are enhanced. Therefore, the "novelty" and "progressiveness" of the present invention are in compliance with the provisions of the Patent Law.爰Proposed an application for the creation of a patent in accordance with the law, praying for a review and early granting of a patent, and it is really sensible.

(customary)

O. . . Button hole

X1. . . First trip

X11. . . Starting point

X12. . . Last point

Y1. . . Second trip

Y11. . . Starting point

Y12. . . Last point

X2. . . Third trip

X21. . . Starting point

X22. . . Last point

Y2. . . Fourth trip

Y21. . . Starting point

Y22. . . Last point

(this creation)

A. . . Stroke sensing device

B. . . Swing arm set

100. . . Sewing machine cantilever

200. . . keyhole

10. . . Pressing foot

11. . . Pressing foot

20. . . Fixing frame

twenty one. . . Pivot

30. . . Sensor

31. . . First sensing unit

32. . . Second sensing unit

33. . . Induction unit

34. . . wire

40. . . main body

41. . . Pivot

410. . . Chute

411. . . Adjustment hole

412. . . First side wall

413. . . Second side wall

414. . . Top wall

415. . . Bottom wall

416, 417. . . Fixed hole

50. . . Slide

51. . . shrapnel

60. . . Adjustment device

61. . . Slider

610. . . Pivot hole

611. . . Slip groove

612. . . Lug

613. . . Extension

614. . . Screw perforation

615. . . Meshing part

616. . . head

617. . . Inclined department

62, 62’. . . Elastic component

63, 63’. . . Adjustment bolt

64. . . Fastener

Figure 1 is a schematic view of the stroke of a general buttonhole sewing.

Figure 1-1 is a schematic diagram showing the error at the beginning and end of the general sewing button hole.

Figure 2 is a schematic exploded perspective view of the present invention.

Figure 3 is a schematic diagram of the planar combination of the present invention.

Fig. 4 is a schematic view showing the plane operation of Fig. 3 of the present invention.

Fig. 5 is a schematic view showing another operation of the plane of Fig. 3 of the present invention.

Figure 6 is a perspective exploded view of another embodiment of the present invention.

Figure 7 is a schematic plan view of the combination of Figure 6 of the present invention.

Figure 8 is a plan view showing the combination of the third embodiment of the present invention.

Figure 9 is a schematic plan view showing a combination of a fourth embodiment of the present invention.

A. . . Stroke sensing device

B. . . Swing arm set

100. . . Sewing machine cantilever

200. . . keyhole

10. . . Pressing foot

11. . . Pressing foot

20. . . Fixing frame

twenty one. . . Pivot

30. . . Sensor

31. . . First sensing unit

32. . . Second sensing unit

33. . . Induction unit

40. . . main body

41. . . Pivot

410. . . Chute

411. . . Adjustment hole

412. . . First side wall

413. . . Second side wall

414. . . Top wall

415. . . Bottom wall

416, 417. . . Fixed hole

50. . . Slide

60. . . Adjustment device

61. . . Slider

610. . . Pivot hole

611. . . Slip groove

612. . . Lug

62. . . Elastic component

63. . . Adjustment bolt

64. . . Fastener

Claims (13)

The utility model relates to a adjusting structure of a swing arm and a swing center of a sewing machine control leg. The sewing machine has a cantilever. The free end of the cantilever has a pressing foot. The bottom of the pressing foot is provided with a pressing foot, and the cantilever has a stroke therein. a sensor of the sensing device and a swing arm set, the swing arm set has a main body for actuating the opening and closing of the sensor, and a sliding member for sliding the sleeve, the sliding member is sleeved at the main body The other end of the sliding member extends toward the pressing foot and is moved when the pressing foot is horizontally moved to the beginning and the end of the stroke; a pivot is disposed in the cantilever; the main body of the swing arm group is opposite to the a pivoting portion is disposed at the pivoting portion; and an adjusting device is disposed opposite to the pivoting portion, and the sliding slot and the sliding block are arranged to be horizontally displaced and positioned by the sliding slot and the slider, wherein The slider is received in the pivoting portion, and the slider is provided with a pivot hole for the pivot to pass through, the pivot is fixed in the cantilever, and the pivot hole of the slider is located at the outer diameter of the cylinder of the pivot on. The adjustment structure of the swing arm and the swing center of the sewing machine control stroke according to the first aspect of the invention, wherein the free end of the cantilever is provided with a plate-like structure bent into a fixed frame. The stroke sensing device is disposed on the fixing frame and is provided with a locking hole for the pivot screw to be fixed. The adjustment structure of the swing arm and the swing center of the sewing machine control stroke according to the second aspect of the patent application, wherein the most narrow end of the pivot has an external thread for Screwed into the lock hole, and the outer diameter at the middle portion is slightly larger than the end portion locked into the lock hole, and a cylindrical body is formed at the end. The adjustment structure of the swing arm and the swing center of the sewing machine control stroke according to the first aspect of the invention, wherein the sensor has a first sensing portion, a second sensing portion, and two sensing portions. a sensing portion between the portions, wherein one end of the sensor is connected to each of the sensing portion and the sensing portion, and a wire is connected to the computer of the sewing machine, and the other end of the sensing portion is actuated by the body of the swing arm group, respectively When the pressing foot moves to the beginning end of the stroke, the sliding member moves the swing arm to the first sensing portion or the second sensing portion. The adjustment structure of the swing arm and the swing center of the sewing machine control stroke according to the fourth aspect of the invention, wherein the sensing portion and the sensing portion are metal sheet electrodes. The adjustment structure of the swing arm and the swing center of the sewing machine control stroke according to the first aspect of the invention, wherein the adjusting device has the chute in the main body pivoting portion of the swing arm group, and the chute system The utility model is characterized in that a horizontally extending hollow groove is formed, and a hole of a screw hole shape is arranged on a side wall of the pivoting portion. The adjustment structure of the swing arm and the swing center of the sewing machine control stroke according to the sixth aspect of the invention, wherein the adjusting device is further provided with an adjusting bolt and an elastic member, and the adjusting bolt is disposed on the sliding groove wall. The adjusting hole is directed toward the slider, and the elastic element is disposed between the sliding groove wall and the sliding block. The adjusting structure of the swing arm and the swing center of the sewing machine control stroke according to the first aspect of the invention, wherein a fixing hole of a screw hole shape is provided at a center of the top and bottom end faces of the pivoting portion for the adjusting device An operator who is threaded relative to the member for adjustment. The adjusting structure of the swing arm and the swing center of the sewing machine control stroke according to the first or eighth aspect of the invention, wherein the slider is a rectangular cylinder and is received on the top and bottom end faces of the pivoting portion. Sliding in the sliding slot, and the top end and the bottom end surface are flush with the opposite end faces of the pivoting portion; the slider is exposed at an end of the sliding slot to extend a lug having a sliding groove, the sliding The slot is horizontally extended, and the sliding slot is a bolt-shaped fixing member that passes through and is screwed into the fixing holes of the pivoting portion. The adjustment structure of the swing arm and the swing center of the sewing machine control stroke according to the seventh aspect of the invention, wherein the elastic component of the adjusting device is in the form of a coil spring, and the adjusting bolt is in the form of a bolt, and The peripheral wall of the pivoting portion is respectively a first side wall, a bottom end wall, a second side wall and a top end wall, and the elastic element is disposed in the sliding slot and respectively elastically abuts against the second side wall of the pivoting portion. An end surface of the sliding slot and an opposite end surface of the sliding block; and the adjusting bolt is screwed into the adjusting hole, and the adjusting bolt passes through the first side wall and enters the end of the sliding groove to abut the slider. The adjustment structure of the swing arm and the swing center of the sewing machine control stroke according to the first aspect of the invention, wherein the slider is exposed at the horizontal end of the sliding slot and has an extending portion parallel to the side wall of the pivoting portion. And has a screw hole shape snail The adjusting pin can be screwed into the screw perforation and facing the side wall, and the elastic element is disposed between the side wall and the sliding block. The adjusting structure of the swing arm and the swing center of the sewing machine control stroke according to the first aspect of the invention, wherein the slider disposed on the pivot has a continuous tooth-shaped engaging portion, and the pivoting portion is opposite to the sliding The end faces of the blocks are arranged to cooperate with each other in a toothed engagement row, and the slider is exposed at the end of the sliding groove to expand to form a head. The adjustment structure of the swing arm and the swing center of the sewing machine control stroke according to claim 12, wherein the slider is configured as a cylindrical body, and a sector gear shape is arranged on the surface with respect to the meshing groove of the sliding groove. The Ministry of Motion.